Downgrade A51 firmware

I have a Galaxy A51 EU running build A515FXXU1ASL6 having issues with streaming audio with Bluetooth. (Sound cuts randomly for 1 -2 seconds.) Is it possible to downgrade firmware to A515FXXU1ASKJ via Odin without voiding warranty? This build was told to be issue free, however I instantly updated the firmware out of the box so I have no idea, however until a fix arrives I cannot use the phone due to this issue while travelling by car.

This was the last time I bought SAMSUNG's any product. After this I am shifting to Huawei and RECOMMEND everyone to do the same. I have lost the trust from SAMSUNG after purchasing A51. It started to give me issues within 1 hour of opening it and taking it out from the box.

iT JUST DOESN'T CONNECT EASILY WITH ANY BLUETOOTH DEVICE, YOU HAVE TO RESTART THE PHONE IN ORDER TO CONNECT IT WITH THE CAR OR ANY SPEAKERS OR ANY HANDSFREE.

I am a musician and the best part is I can't connect any music to anywhere and by chance if the phone gets connected it will give a randon stutter of 1 to 2 seconds.

The sound then later starts to come out from the screen itself instead of the speakers. and you can do anything with the volume levels since they are full.

Last night I was driving and the map was on and I was on call with my family when suddenly the phone restarted itself out of nowhere. SAMSUNG YOU TOOK ALL YOUR TRUST AWAY AND THE BEST PART IS YOUR SERVICE CENTER WAS SAYING THEY WILL REPAIR THE CELL PHONE AND WILL TAKE 2-3 DAYS TO DO THAT.